We've got another fun video from the special features on the Thor: The Dark World Blu-ray and DVD. This one is a gag reel that features the cast and crew goofing around and messing up on the set of the movie. There's some funny footage included that features stumbles, hammer malfunctions, clumsy extras and more. The film will be available for download on February 4th, and then it hits shelves on February 25th. Thanks to MTV.